OK well i plan on going to my lfs and buy some guppies and rosy reds, about 50 of them to put into my 20 gallon. Then i would store them for about a week then throw half in with the cichlids then the next week throw the other half in there. But anyway as we all know they can have diesase. When i get them what do i look for as they are in the 20 gallon. Also is 50 of these little fish too much for a 20 gallon